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CALLAHAN 6L De RUSH.

Cotton Seed Huller.

' |\10.98,921.4 v Patented 1an. 1a, 1870.

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W.y P. CALLAHAN A'ND D. R. DE RUSH, 0F DAYTON, OHlO.

Letters PatentNo. 98,921, dotcd January 18, 1870.

* -my n- IMPROVEMENT IN COTTON-SEED HULLERS.

The Schedule referred to in these Letters Patent and making part of the :same` 'which will enable others skilled in the art to make and use the same, reference being hadto the accomv panying drawings, forming part of this speeilication.`

This inventionrelates to improvements in machin- 'ery for hulling cotton-seedand has for itsrobject to provide a simple, cheap, and durable construction and arrangement for such machines.

Theinvention consists in the mode of securing the 'blades hymeans of wedge-shaped grooves and keys,

the widest-.ends of the grooves and keys being at the eyes, whereby the grinding-action has a tendency to tighten them, all as hereinafter more full'y specified.

Figure 1 represents a sectional elevation of our improved machine, and l Figure 2 represent a horizontal section of the same.

A A represent the disks, preferably made of castiron, and provided with wedge-shaped grooves in their faces for securing the steel grindingfplates B, bymeans of the wedges E, the said grooves being widest at the eye, so that the grinding-action has a tendency to keep the said wedges tight. l

These plates, projecting above the surfaces of tbe disks, are inclined from the eye in the stationary stone, the way the runner turns, and in the manner they are inclined in the opposite direction, whereby ashear, or outward action is imparted to the seeds passing between the stones, giving them a free and active movement toward the skirt. The said plates may he inclined more or less, as may he found best.

Either of the disks may be arranged for running, as preferred.

This arrangement of the blades alords aready means of removing and replacing them, and they are very elicient in hulling cotton-seed. They are also economical in respect of repairs, as the disks remain in good condition, and the blades onlyhave to be changed. Having thus described our invention,

What we claim as new, and desire to secure by Leti ters Patent, is

The arrangement of the wedging-grooves and wedges, in respect to the direction of the grinding-k 

